27 lines
710 B
C
27 lines
710 B
C
#include "global.h"
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s32 __osPiRawStartDma(s32 dir, u32 cartAddr, void* dramAddr, size_t size) {
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register s32 status = HW_REG(PI_STATUS_REG, u32);
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while (status & (PI_STATUS_BUSY | PI_STATUS_IOBUSY)) {
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status = HW_REG(PI_STATUS_REG, u32);
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}
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HW_REG(PI_DRAM_ADDR_REG, void*) = (void*)osVirtualToPhysical(dramAddr);
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HW_REG(PI_CART_ADDR_REG, void*) = (void*)((osRomBase | cartAddr) & 0x1FFFFFFF);
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switch (dir) {
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case OS_READ:
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HW_REG(PI_WR_LEN_REG, u32) = size - 1;
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break;
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case OS_WRITE:
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HW_REG(PI_RD_LEN_REG, u32) = size - 1;
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break;
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default:
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return -1;
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break;
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}
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return 0;
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}
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